Elasticsearch query strategy for nested array elements

arrays json elastic-map-reduce elasticsearch

First, you should move channel data to separate fields (or to object field at least)
If you need simple matching algo (±deviation without scoring), then you can perform simple filter>range queries, passing your fuzziness threshold in query.
If you need scoring (how much similar that docs are), than you need to perform scripted queries. Take a look at this article

Btw, I strongly recommend work in HSL space, if you need such operations, you'll get much better results. Take a look at this example

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